^  COM1_SEL               |||      ^  COM2_SEL                    ||||      ^  LVDS_SEL             |||      ^  BLK_SEL             |||      | XXXX        |||
|  1         |  3  | RS232  | :::  | 1         | 3  | RS232        || :::  | 1         | 3  | EDP   | :::  | 1        | 2  | 3.3V  | :::  |       |   |   |
|  2         |  4  | :::    | :::  | 2         | 4  | :::          | :::  | :::  | 2         | 4  | :::   | :::  | 3        | 4  | 5V    | :::  |       |   |   |
|  3         |  5  | RS485  | :::  | 3         | 5  | RS485        || :::  | 3         | 5  | LVDS  | :::  | 5        | 6  | 12V   | :::  |       |   |   |
|  4         |  6  | :::    | :::  | 4         | 6  | :::          | :::  | :::  | 4         | 6  | :::   | :::  |          |    |       | :::  |       |   |   |